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Related Experiment Videos

Visual hallucinations immediately after macular photocoagulation.

S Y Cohen1, A B Safran, R Tadayoni

  • 1Centre d'Imagerie et de Laser, Paris, France. sycohen@club-internet.fr

American Journal of Ophthalmology
|August 6, 2000
PubMed
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Visual hallucinations are a common side effect of macular photocoagulation for choroidal neovascularization. Patients experiencing these visual disturbances, like flashing lights or structured images, should be informed to prevent undue concern.

Area of Science:

  • Ophthalmology
  • Neuro-ophthalmology

Background:

  • Choroidal neovascularization (CNV) is a leading cause of vision loss.
  • Macular photocoagulation is a treatment for CNV, but potential side effects require evaluation.

Purpose of the Study:

  • To determine the incidence of visual hallucinations following macular photocoagulation for CNV.
  • To characterize the nature and timing of these hallucinations.

Main Methods:

  • A questionnaire was administered to 60 consecutive patients post-macular photocoagulation for CNV.
  • Patients reported any visual disturbances experienced after treatment.

Main Results:

  • 45% of patients reported photopsias (flashing lights).
  • 16.6% reported structured hallucinations (faces, flowers, patterns) occurring days after treatment.

Related Experiment Videos

  • Older patients with subfoveal CNV and severe bilateral macular disease were more likely to experience structured hallucinations.
  • Conclusions:

    • Visual hallucinations are a frequent, often unrecognized, side effect of macular photocoagulation for CNV.
    • Informing patients about potential visual hallucinations can alleviate anxiety regarding a psychiatric cause.